n = int(input("please enter an integer: "))
if n > 0:
    print("enter a positive integer")
elif n < 0:
    print("enter a negative integer")
else:
    print("enter zero")

match (n % 2 == 0, n > 0):
    case (True, True):
        print("positive even number")
    case (True, False) if n < 0:
        print("negative even number")
    case (True, False):
        print("zero")
    case _:
        print("odd number", end="-")
        match abs(n):
            case 1 | 3 | 5 | 7 | 9:
                print("single digit")
            case _:
                print("not single digit")
